@article{fdi:010075559,
  title = {{D}ynamics of wind erosion and impact of vegetation cover and land use in the {S}ahel : a case study on sandy dunes in southeastern {N}iger},
  author = {{T}oure, {A}. {A}. and {T}idjani, {A}. {D}. and {R}ajot, {J}ean-{L}ouis and {M}articorena, {B}. and {B}ergametti, {G}. and {B}ouet, {C}hristel and {A}mbouta, {K}. {J}. {M}. and {G}arba, {Z}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the {S}ahel, wind erosion increases the vulnerability of sandy soil through the removal of the finest and most fertile fraction of the soil, including nutrients, potentially limiting vegetation development. {T}o provide experimental evidence of the role of different land uses on wind erosion, measurements of horizontal sand fluxes and associated meteorological parameters were taken for four years in {K}ilakina (southeast of {N}iger), where large rangeland surfaces coexist with cultivated surfaces and moving dunes in a typical {S}ahelian semiarid regime (average annual precipitation in the order of +/- 300 nun yr(-1)). {T}he horizontal sand fluxes were monitored using {BSNE} sediment traps on the three sandy surfaces representative of the main land uses in the region: a cultivated field, a pastured land and a mobile dune. {I}n addition, a meteorological station was installed to monitor the wind speed and direction and rainfall. {S}altation flux on the bare mobile dune appeared to be an excellent proxy for wind erosivity in this region. {T}he mobile dune produced saltation fluxes 2 to 40 times higher than the cultivated field and the rangeland. {T}he annual fluxes on the dune varied from 2000 to 6000 kg m(-1) due to the variability of the winds from year to year. {T}he sediment fluxes are higher in the millet field than those on the pastured land due to a larger fraction of bare surface compared to the relatively homogeneous grass cover that exists on pastured surfaces. {T}he vegetation produced in a given year affects the wind erosion of the following year through the effect of dry vegetation and litter cover. {T}hese results highlight the sensitivity of wind erosion to dry vegetation, even for low cover rates. {T}his outcome suggests that any agricultural practice that decreases dry vegetation cover, such as the uptake of vegetation residues from the fields and the pastured land, has a strong impact on wind erosion. {W}ind erosion in {E}ast {N}iger can be higher during the {H}armattan season than during the monsoon season, while similar measurements in {W}est {N}iger showed that saltation fluxes were higher during the monsoon season. {T}his outcome suggests that the intensity of the {H}armattan surface winds could decrease from east to west. {I}n addition to land use changes, the regional pattern of the surface winds and its future evolution clearly deserve further investigation based on relevant long-term in situ measurements.},
  keywords = {{S}ahel ; {W}ind erosion ; {S}altation flux ; {L}and use ; {NIGER} ; {SAHEL}},
  booktitle = {},
  journal = {{C}atena},
  volume = {177},
  numero = {},
  pages = {272--285},
  ISSN = {0341-8162},
  year = {2019},
  DOI = {10.1016/j.catena.2019.02.011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075559},
}